JP2598642B2 - Wrap film storage box and method of manufacturing the same - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement technique for a wrap film storage box having a film end unwinding preventing ability.

2. Description of the Related Art A wrap film storage box having a film end rewind preventing ability is known. This is known, for example, from Jiko 52-1979.
No. 0, etc., and when handling various commercially available storage boxes, that is, the roll-shaped wrap film stored inside the box body is drawn out to a desired length, and the drawn-out film is subjected to the above-described processing. It was cut off with a cutting tool arranged on the box body in a state where it was pressed between the front plate part constituting the box body and the side cover provided at a position covering the front plate part, and used. In such a case, the film end which remains outside the box body in the drawn state and becomes a starting point for the next drawer is often invited by the rotation of the roll film and is rewound into the box body, which often occurs. The next withdrawal becomes extremely difficult and is considered as a preventive measure. There are various proposals as measures to prevent rewinding.

[Problems to be solved by the invention]

For example, in U.S. Pat.No. 3,845,894, a pressure-sensitive adhesive layer provided on a front plate portion of a box body is peeled off and removed at the tip of a glued side cover at a position covering the front plate portion. When the film is exposed to the surface of the box, the end of the film is captured by the pressure-sensitive adhesive layer, but it is difficult to adjust the adhesive force properly and maintain the adhesive force. is there. There are proposals in US Pat. No. 3,974,947 and US Pat. No. 4,307,828 as improvement measures. Both recommend that the pressure-sensitive adhesive layer be depressed from the surface of the front plate, but the former requires an extra operation of pressing the film into the depression with a finger, and the latter requires the extra cost of making the film. There is a problem that one is lacking in maintaining power.

U.S. Pat.No. 3,028,060 discloses a proposal which does not use an adhesive, which employs a reciprocating plate having a roughened surface in the form of a sandpaper to press and lock the film. Although the suction locking is disclosed, respectively, U.S. Pat. No. 3,028,060 discloses an operation mechanism that is too complicated, and Japanese Unexamined Utility Model Publication No. There is a problem that it is poor.

[Means for solving the problem]

The point of the present invention is as follows. Item 1 proposes that a flat layer obtained by cross-linking and curing a coating layer of a cross-linkable curing varnish is brought into close contact with the end of the film to capture the film. Proposal of a method for forming a crosslinked and hardened flat layer, which is appropriate for intimately contacting and capturing the edge.

[Action]

The difference between the flat layer obtained by cross-linking and curing the cross-linkable curing varnish and the conventional product (locking layer) proposed in the present invention is as follows: a) Since the flat layer is cross-linked and hardened, its surface is Is hard and sticks to other things as in the case of the contact / adhesive layer,
There is no stickiness to adhere dust and dirt, and the state of the surface layer is not changed. B) Adhesion capture of the film is self-adhesiveness of a thin film having a smooth surface with respect to the flat layer. Therefore, the film capturing (adhesion) force of the flat layer surface is
Moderately weak and constant so that the captured film is not broken; c) forming the flat layer on a box-to-thick plate is easy, and in order to maintain the film capturing force on the flat layer surface, It is not necessary to give the box a special structure.

〔Example〕

FIGS. 1, 2, and 3 are conceptual views showing an example of the box proposed in the present invention. FIG. 2 is a perspective view of the assembled box, and FIG. FIG. 4 is a development view of the box body, showing a state in which the box body is made of one piece of cardboard. FIG. 3 is a cross-sectional view of the box shown in FIG. 1 and shows a traveling path of the film in use.

In FIG. 1, the side plates 1, 2, 3, 4, and 5 are folded into the front plate portion 1, the bottom plate portion 2, the rear plate portion 3, the cover plate portion 4, and the cover portion 5, respectively, of the box body. They are connected via a line (broken line), and are bent inward along the folding line to form a box. At this time, both end plates 9, 9 ', 6, which are connected to both ends of the side plates 1, 2, and 3 via fold lines (broken lines) and are cut at respective solid line portions.
6 ', 8, 8' are folded inward along the fold lines so that 8, 8 'are superimposed on the end plates 9, 9', and 6, 6 'are overlapped thereon. Piece 7, 7 '
The end plates 6, 6 'in the form of a box are formed with the end plates 6, 6' bent inward as the surface. The cover part 5 is a front plate part 1 of a box housing a rolled wrap film therein.
2 to form the side cover 5, which forms the box of FIG. 2 having the cross-sectional view of FIG. The cover 5 in this example has a structure in which the closing pieces 51, 51 'can be separated so as to leave the insertion piece 5' by intermittent cut lines 52, 52 '.
The closing piece 51, 51 'is provided with a semicircular notch 53,
On the other hand, the front plate portion 1 corresponding to the position of the semicircular cut portion 53 has an enclosed half cut 11 having a depth substantially half the plate thickness.
Is arranged. The surface of the front plate portion 1 is a printed portion containing a release agent, and a non-printed portion is provided inside the half notch 11 enclosed.

The function in this example is that when it is desired to bond the cover part 5 to the front plate part 1 to form a sealed box (product), an adhesive is applied along the half notch 11 of the front plate part 1 and the cover is applied. Even when the cover 5 is joined to the back surface, only the back surface of the cover 5 and the non-printed portion of the half cut 11 are in close contact. Therefore, when this is opened and used for use, as shown in FIG. 2, it is performed by separating the closing pieces 51, 51 'from the box along the intermittent cut lines 52, 52'. By the action of the cut portion 53 and the half cut 11, the surface of the front plate portion 1 can be easily cut off and opened without significantly damaging the surface.

The bottom plate 2 is provided with a cutting tool 21 at a position where the cutting edge protrudes from the end of the bottom plate when it is formed into a box, and the cut 10 in the front plate 1 is inserted with an insertion piece 5 'to insert a cover. To prevent the portion 5 from jumping up, 100 is disposed at a position covered by the cover 5 with the crosslinked hardened flat layer according to the present invention. This cross-linked cured flat layer 100 can be used even if it is disposed on the back surface of the cover 5 because it does not change from the viewpoint of tightly capturing the film, but is omitted from the drawing.

In FIG. 3, a wrap film F wound in a roll shape on a winding core P passes through the back surface of the cover 5 from above the front plate 1 and the cover plate 4 to a desired length in the direction of arrow A. It is withdrawn. The pulled out film F is pressed between the front plate 1 and the side cover 5 at a position covering the front plate 1 by the operation of the finger of the hand holding the box, and the film F having the front end of the film F is provided. By the pressing operation of one hand, the cutting tool 21 protrudes from the end of the bottom plate portion of the box body bottom plate portion 2 and is sharply cut for use.

At this time, the film F between the front plate portion 1 and the cover portion 5 at a position covering the front plate portion 1 is pressed on the surface of the cross-linked hardened flat layer 100, and is tightly captured on the hard surface and rewound into the box. It will not be done.

As a method of forming the crosslinked cured flat layer 100, first, a crosslinked cured varnish is applied to a desired position of the thick box. The application at this time depends on the printing method, but it is preferable to increase the viscosity of the varnish liquid by about 20 to 50% so as to apply a thick coating, or to apply the varnish over ordinary printing.
As a varnish of this type, for example, an acrylic-modified resin such as an epoxy-based acrylate, a polyester-based acrylate, or a polyurethane-based acrylate is generally used as a base resin, and there is also a varnish using an unsaturated polyester resin. "Lyocure" from Toyo Ink Mfg. Co., Ltd., "Viscoat" from Osaka Organic Chemical Industry Co., Ltd., "Conidic" from Dainippon Ink and Chemicals, Inc., "Aronix" from Toa Gosei Chemical Industry Co., Ltd. are commercially available. Has been known.

Thereafter, the coating layer of the crosslinkable curing varnish is cured by being crosslinked, and becomes a layer having a smooth and flat surface. Crosslinking at this time is performed by electron beam irradiation, ultraviolet irradiation, heat ray irradiation, or the like. Although this crosslinking means is determined by the type of the crosslinkable curing varnish used, ultraviolet irradiation crosslinking is easy to use and is excellent.

Further, the cross-linking hardened flat layer 100 is a very small part of the box covered with the cover 5, and the area is, for example, 6 cm ² (2 cm × 3 cm) to
A cm ² (2.5 cm x 4 cm) is sufficient, and does not need to be wide. It is desirable that the outer peripheral portion of the tubular wrap is arranged at a position where the outer peripheral portion of the cylindrical wrap comes into contact with the inside of the box when pressed, substantially at the center of the front plate portion 1.

The crosslinked cured flat layer obtained in this way adheres to other objects as in the case of an adhesive layer or a pressure-sensitive adhesive layer, dust,
There is no adhesion of garbage. Therefore, it can be said that a great advantage is that it can be handled as one step of printing a box body thick plate, and that there is no need to consider adhesion in the box assembly step.

Generally, the printing ink used for the film storage box has a roughened surface due to the effect of the solvent that evaporates during drying, and has a poor ability to absorb irregularities of the cardboard material and form a smooth painted surface. It is even more so that the lubricant is sprayed and the painted surface is given anti-blocking properties. On the other hand, there is an idea that the smoothness of the resin film surface is used for forming the smooth surface. However, also in this case, the laminating operation is difficult with a thin wall of 10 μm or less, and it is difficult to absorb the irregularities of the cardboard material. Not at present. From such a background, it can be said that the crosslinked cured flat layer of the present invention is useful.

In the above-described embodiment, a box body in which the side cover unit 5 rotates independently has been described, but this is a so-called trunk-type box body in which the side cover unit is integrated with the end cover unit. It is clear that it can be applied to

As the film which easily adheres to the crosslinked cured flat layer of the present invention, a thin film of a soft synthetic resin represented by a name such as vinyl chloride, vinylidene chloride, ethylene vinyl acetate, ethylene-propylene, polypropylene and polyethylene is desirable. Among them, vinylidene chloride resin films commercially available under the trade names of Saran Wrap and Cle Wrap are most preferable because of their excellent adhesion.

〔The invention's effect〕

According to the present invention, there is provided a wrap film storage box having the above-described configuration and having the ability to prevent the film end from rewinding. The features of this film are that the film is captured securely, and the film does not break when peeled off. The film capture force is maintained at a constant level, and no special structure is required to maintain the film at a constant level. Since the varnish layer solidifies instantly, it is easy to manufacture, so it does not increase costs, it is easy to handle, no extra operation is required, etc.It has the effect that all conventional problems are improved. That is.

 Therefore, the present invention is an excellent invention useful to the industry.

[Brief description of the drawings]

1, 2, and 3 are conceptual views of a storage box showing an embodiment of the present invention, which are a development view, a perspective view, and a cross-sectional view, respectively. 1 front plate part 5 cover part F side wrap film 21 cutting tool 100 cross-linked hardened flat layer

Claims (2)

(57) [Claims] 1. A roll-shaped wrap film housed in a box body is drawn out to a desired length, and the drawn-out film is covered with a front plate part constituting the box body and a position for covering the front plate part. In a wrap film storage box that can be cut and used with a cutting tool arranged in the box while being pressed between the side cover provided in A flat surface obtained by cross-linking and curing a coating layer of a cross-linkable curing varnish on the front plate surface or the back surface of the side cover at the portion where the plate and the side cover provided at the position covering the front plate overlap. A wrapping film storage box having a film end rewind preventing function, wherein a layer is arranged. 2. A roll-shaped wrap film housed in a box body is drawn out to a desired length, and the drawn-out film is covered with a front plate part constituting the box body and a position covering the front plate part. In a method of manufacturing a wrap film storage box which can be cut and cut with a cutting tool arranged in the box while being pressed between the side cover provided in the box cover, the box is constituted. After applying a cross-linkable hardening varnish to the front plate surface or the back surface of the side cover at the part where the front plate and the side cover provided at the position covering the front plate overlap. A method for manufacturing a wrap film storage box having an ability to prevent unwinding of a film end, wherein a cured flat layer is formed by crosslinking the film.